Plastering compound



, cusejin GEORGE \VES'I, F SYRACUSE, N YORK.

PLASTERING coMPouNu.

SPECIFICATION forming part of Letters PatentNo. 422,269, dated February 25, 1890;

Application filed July 18, 1888. Renewed August 2,

To all whom it may concern.-

Be it known that I, GEORGE WEST, of Syrathe county of Onondaga, in the State ofNew York, have invented new and useful Improvements in Plastering Compounds, of ,Which the following is a full, clear, and exact description.

' parts of dextrine, and

My invention relates to an improved compositionof matter to be used with plnsjcr-ofparis, marble-dust, talc, soapstone, or sand, for plastering and other analogous purposes; and it consists, essentially, of a suitable retardel, preferably glue. and dextrine, and

in some instances I combine therewith sal-' soda, compounded as hereinafter set forth, and used in about the following proportions, viz: Two parts of glue, two parts to three when desired also two parts of Sal-soda.

I prepare the composition in the following manner, to wit:- I dissolve glue in water, or-

1 :dinarilytaking about six parts of water to I j two parts of glue; JVith this solution I mix about three-parts of dextrine, although the quantity-of the latter may be varied within reasonable limits.

When it is desired to have the compound dryjand in a merchantable condition, I take up the moisture'of the aforesaid solution of by adding to the said solution a sufficient -.,,qua'ntity of dry lent material. .31

" serves to" retain the moisture glue before mixing therewith the dextrine :mine'ral absorbent, which may consist either of whiting, clay, or equivatwentyparts of.'this absorbent are sufiicient -.for the aforesaid purpose, and after the moisture has thus been taken from the aforesaid solution I mix therewiththe aforesaid" The office of the dex required hardness and material, and it also sufliciently to trine is to givethe adhesiveness to the facilitate the spreading of the mortar under the trowel.

= By adding about two'pounds of sal-so'da to the aforesaid compound of glue and dextrine .I} impart to the completed material a con pound of the compound In practice I'find that about solving the glue easily. It is preferred to add the sal-soda to the glue in process of being dissolved, inasmuch as the sal-soda accelerates'said process.

The oflice of ting action of the completed material, and any'other suitable and well-known retarder such-as molasses and other substances-may be substituted for the glue.

The composition. is desired to be used with pIasterbf-paris, sand, talc, soapstone, and

marble-dust in plastering the walls and ceil- 'ings of buildings, making wall moldings and cornices, and for other analogous purposes.

When used for what is termed in plastering the scratch-coat, I take about one andmix it thor oughly by the ordinary and well-known means with about-thirteen pounds of plaster-of-paris or equivalent pounds of sand. The quantity of the sand used I have found in practice may be .greatly varied as, for instance, I have used as little as fortypounds, and then again as much as sistency which allows it to be' worked more the glue is to retard the setmaterial and about sixty seventy-five pounds, with substantiall'y'the same result.

When what is termed in plastering the l is desired, I add one pound finishing-coat 0f the compound to the same quantity of plaster as when a scratch-coat is required, but in place of the sand I use about twentytwo pounds of marbladust, tale, The proportion'of the latter may, however,

or soapstone;

be considerably varied,as I have found in I practice.

When a very fine white coat. is required, I

prefer to use talc. When-a fine graycoat is required, I prefer to use soapstone.

The office of the ting of the plaster, known retarder-such as molasses, taric, or acetic acid'-may-be used. course obvious talc, or marble-dust combined. -To absorb the that, if desired, marble-dusk.

. glue isto retard the setj and inits place any well- A citric, tarf It is of and soapstone can bemoisture arising from dis and salsoda in the watergl 226 6e (if th wiajifgipg pf ity piajg VII-'1 tstimohy signed my name,

materiarca ablepf absorbing the moisture 5 c1aimist v x 'fLlThe' composition of matter cqnsisting of glue, fiex-trine, and sal-soda, as set forth.

1 2. The improived composition of matter 1 1 consisting of g1u'e,1dextrine, Sal-soda; anda Witnesses: zo drymineml absorbent, substantiallyas speci- 1 O. H. DUELL,'

' t t MARK W. DEWEY..

. GEORGE WEST. fsJ'f-f;

1 fied 'wherdf .I havga hereuiltq" '1. iif-bf-parigmagi'bleflust; orfa'ny' similar dry in the presence of two witf nesses, at Syracuse, inthe county of Qnon-j ,zliztiiing' described mylnvjention, what I dagag in' the State of New York, this l6th day 15.; 

